Operating Systems Mock Test 1

What function is used to return the length of a string in C++?

1 Mark(s)

Your Answer:

length() length()
size() size()
strlen() strlen()
length length

Suppose listExample is [3, 4, 5, 20, 5, 25, 1, 3], what is list1 after listExample.pop(1)?

1 Mark(s)

Your Answer:

[3, 4, 5, 20, 5, 25, 1, 3] [3, 4, 5, 20, 5, 25, 1, 3]
[1, 3, 3, 4, 5, 5, 20, 25] [1, 3, 3, 4, 5, 5, 20, 25]
[3, 5, 20, 5, 25, 1, 3] [3, 5, 20, 5, 25, 1, 3]
[1, 3, 4, 5, 20, 5, 25] [1, 3, 4, 5, 20, 5, 25]

What is the correct way to access the last element in an array named numbers in C#?

1 Mark(s)

Your Answer:

numbers[numbers.Length] numbers[numbers.Length]
numbers[numbers.Length + 1] numbers[numbers.Length + 1]
numbers.Last() numbers.Last()
numbers[numbers.Length - 1] numbers[numbers.Length - 1]

Which of the following can be used to navigate documents?

1 Mark(s)

Your Answer:

frames frames
hyperlinks hyperlinks
web toolbar web toolbar
all of the above all of the above

All animals have specific features, which helps them to stay in their:

1 Mark(s)

Your Answer:

habitat habitat
place place
pond pond
area area

Determine the Final Output: void main() { printf("\nab"); printf("\bsi"); printf("\rha"); }

1 Mark(s)

Your Answer:

absiha absiha
asiha asiha
haasi haasi
hai hai

Select correct type of line configuration:

1 Mark(s)

Your Answer:

Multi-point Multi-point
Single point Single point
Link Link
Dedicated point Dedicated point

If you hard disk is partitioned into 3 drives, the number of recycle bin for that hard disk is

1 Mark(s)

Your Answer:

1 1
2 2
3 3
4 4

Can we use a function as a parameter of another function? [Eg: void wow(int func())].

1 Mark(s)

Your Answer:

Yes, and we can use the function value conveniently
Yes, but we call the function again to get the value, not as convenient as in using variable
No, C does not support it No, C does not support it
This case is compiler dependent This case is compiler dependent

What is the difference between TCP and UDP in networking?

1 Mark(s)

Your Answer:

TCP provides reliable, connection-oriented communication, while UDP provides unreliable, connectionless communication
TCP provides unreliable, connectionless communication, while UDP provides reliable, connection-oriented communication
TCP is faster than UDP TCP is faster than UDP
UDP is more secure than TCP UDP is more secure than TCP

Moon has less:

1 Mark(s)

Your Answer:

gravitational force gravitational force
light light
air air
gases gases

Which of the following statements are incorrect?

1 Mark(s)

Your Answer:

public members of class can be accessed by any code in the program
private members of class can only be accessed by other members of the class
private members of class can be inherited by a subclass, and become protected members in subclass
protected members of a class can be inherited by a subclass, and become private members of the subclass

What will be the output of the following C# code? class Program { static void Main(string[] args) { int i ; for ( i = 0; i < 5; i++) { int j = 0; j += i; Console. WriteLine(j); } Console. WriteLine(i); Console. ReadLine(); } }

1 Mark(s)

Your Answer:

0, 1, 2, 3, 4, 5, 6 0, 1, 2, 3, 4, 5, 6
0, 1, 2, 3, 4, 5 0, 1, 2, 3, 4, 5
0, 1, 2, 3, 4 0, 1, 2, 3, 4
0, 1, 2, 3 0, 1, 2, 3

Which of the following expressions results in an error?

1 Mark(s)

Your Answer:

float('10') float('10')
int('10') int('10')
float('10.8') float('10.8')
int('10.8') int('10.8')

The updates performed by the transaction become permanent in the database, by using:

1 Mark(s)

Your Answer:

Transit work Transit work
Trace work Trace work
Rollback work Rollback work
Commit work Commit work

What is the main disadvantage of the Naive string matching algorithm?

1 Mark(s)

Your Answer:

It is complex to implement. It is complex to implement.
It requires the text to be sorted. It requires the text to be sorted.
It cannot handle patterns with special characters.
It can be slow for large texts. It can be slow for large texts.

The jQuery selector used to select the elements with the specified language code is -

1 Mark(s)

Your Answer:

jQuery :contains selector jQuery :contains selector
jQuery :lang() selector jQuery :lang() selector
jQuery :nth-child selector jQuery :nth-child selector
None of the above None of the above

Earth's orbital speed is equals to:

1 Mark(s)

Your Answer:

13.1 Km/s 13.1 Km/s
29.8 Km/s 29.8 Km/s
24.1 Km/s 24.1 Km/s
29.8 Km/s 29.8 Km/s

14.7ln/in2=:

1 Mark(s)

Your Answer:

1 atm 1 atm
2 atm 2 atm
3 atm 3 atm
4 atm 4 atm

What is the main advantage of using OOP principles in programming?

1 Mark(s)

Your Answer:

Modularity and reusability Modularity and reusability
Improved performance Improved performance
Simplicity and ease of use Simplicity and ease of use
Reduced memory usage Reduced memory usage

State whether the given statement is true or false. !DOCTYPE is case sensitive”

1 Mark(s)

Your Answer:

True True
False False

A reactive fault management system is responsible for:

1 Mark(s)

Your Answer:

detecting and isolating detecting and isolating
correcting, and recording correcting, and recording
security and recording security and recording
both a and b both a and b

A rectangle represents which of the following in an EER?

1 Mark(s)

Your Answer:

Attribute Attribute
Entity Entity
Optional One Optional One
Relationship Relationship

What will be the output of the following C# code? static void Main(string[] args) { int I, J = 0; for (I = 1; I < 10; ) ; { J = J + I; I += 2; } Console.WriteLine("Sum of first 10 even numbers is:"+J); Console.ReadLine(); }

1 Mark(s)

Your Answer:

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
25 25
1 1
Run time error Run time error

Which of the following is not a kind of inheritance?

1 Mark(s)

Your Answer:

Distributed Distributed
Multiple Multiple
Multi-level Multi-level
Hierarchal Hierarchal

The statement that starts on the next tuple, from the beginning of the loop, skipping the remaining statements, is known to be:

1 Mark(s)

Your Answer:

Initial Initial
Begin Begin
Iterate Iterate
leave Start leave Start

Which of the following feature interacts one object with another object?

1 Mark(s)

Your Answer:

Message reading Message reading
Message passing Message passing
Data transfer Data transfer
Data binding Data binding

A method defines the form or protocol of the operation, but not its implementation.

1 Mark(s)

Your Answer:

True True
False False

What is the space complexity of standard DFS(V: no. of vertices E: no. of edges)?

1 Mark(s)

Your Answer:

O(V+E) O(V+E)
O(V) O(V)
O(E) O(E)
O(V*E) O(V*E)

Date and time are available on the desktop at

1 Mark(s)

Your Answer:

Keyboard Keyboard
Recycle Bin Recycle Bin
My Computer My Computer
Task Bar Task Bar
None of these None of these

Choose the class from which the namespace 'System.Type' is derived?

1 Mark(s)

Your Answer:

System.Reflection System.Reflection
System.Reflection.MemberInfo System.Reflection.MemberInfo
Both System.Reflection & System.Reflection.MemberInfo
None of the mentioned None of the mentioned

A SQL statement comprising a logical entity is called:

1 Mark(s)

Your Answer:

Database object Database object
Database operation Database operation
Database definition Database definition
Database declaration Database declaration

A single processor executes a single instruction stream to operate on data stored in a single:

1 Mark(s)

Your Answer:

Computer Computer
System System
Memory Memory
Device Device

Ctrl + G shortcut key used for?

1 Mark(s)

Your Answer:

Go To dialog box Go To dialog box
Group selected objects Group selected objects
Insert Graph Insert Graph
Open Gridlines Open Gridlines

For examining the microscope slides, the power objective should be:

1 Mark(s)

Your Answer:

low low
high high
doesn't matter doesn't matter
constant constant

The effect of null values on some of the more complicated SQL constructs can be:

1 Mark(s)

Your Answer:

Subtle Subtle
Easy Easy
Ideal approach Ideal approach
None of the above None of the above

Which of the following is a valid way to declare and initialize a string variable in C#?

1 Mark(s)

Your Answer:

string = str; string = str;
str Hello; str Hello;
string str = "Hello"; string str = "Hello";
str = "Hello"; str = "Hello";

Process of removing a file from a compressed archive is termed as:

1 Mark(s)

Your Answer:

pulling pulling
restoring restoring
uninstalling uninstalling
extracting extracting

. . . . . . . . is a Java library for writing, testing, and running pipelines of MapReduce jobs on Apache Hadoop.

1 Mark(s)

Your Answer:

cTakes cTakes
Crunch Crunch
CouchDB CouchDB
None of the mentioned None of the mentioned

Process of storing programs and data in a computer memory is called:

1 Mark(s)

Your Answer:

CPU CPU
data processing data processing
fixed disk fixed disk
stored-program concept stored-program concept

By default JavaScript displays the numbers as . . . . . . . .

1 Mark(s)

Your Answer:

base 16 base 16
base 10 base 10
base 6 base 6
base 2 base 2

Total specialization is represented by double lines between the supertype and subtype on an EER.

1 Mark(s)

Your Answer:

True True
False False

What will be the output of the following C# code? public static void Main(string[] args) { int a = 4; int c = 2; bool b = (a % c == 0 ? true : false); Console.WriteLine(b.ToString()); if (a/c == 2) { Console.WriteLine("true"); } else { Console.WriteLine("false"); } Console.ReadLine(); }

1 Mark(s)

Your Answer:

TRUE FALSE TRUE FALSE
FALSE TRUE FALSE TRUE
TRUE TRUE TRUE TRUE
FALSE FALSE FALSE FALSE

In MS Word, Ctrl + H Shortcut is used for?

1 Mark(s)

Your Answer:

Open Help Window Open Help Window
Find and Replace Find and Replace
Highlight Text Highlight Text
Insert Hyperlink Insert Hyperlink

What is the default storage class for global variables?

1 Mark(s)

Your Answer:

auto auto
static static
extern extern
register register

A multidimensional database model is used most often in which of the following models?

1 Mark(s)

Your Answer:

Data warehouse Data warehouse
Relational Relational
Hierarchical Hierarchical
Network Network

Which element is used to group inline-elements?

1 Mark(s)

Your Answer:

What keyword is used in Go to launch a lightweight concurrent execution thread (goroutine)?

1 Mark(s)

Your Answer:

go go
async async
spawn spawn
thread thread

A number system that has eight different symbols to represent any quantity is known as…..?

1 Mark(s)

Your Answer:

Binary Binary
Octal Octal
Decimal Decimal
Hexadecimal Hexadecimal

Which file mode opens for reading and writing?

1 Mark(s)

Your Answer:

rw rw
rw+ rw+
r+ r+
x x

Determine output: class A{ public void printName(){ System.out.println("Name-A"); } } class B extends A{ public void printName(){ System.out.println("Name-B"); } } class C extends A{ public void printName(){ System.out.println("Name-C"); } } public class Test{ public static void main (String[] args){ B b = new B(); C c = new C(); b = c; newPrint(b); } public static void newPrint(A a){ a.printName(); } }

1 Mark(s)

Your Answer:

Name B Name B
Name C Name C
Compilation fails due to an error on lines 5
Compilation fails due to an error on lines 9
None of these None of these

What happens if you attempt to free the same block of memory twice in C?

1 Mark(s)

Your Answer:

It leads to undefined behavior It leads to undefined behavior
The program terminates The program terminates
Memory is released, but the pointer remains valid
Memory is leaked Memory is leaked

Which operator is used to access members of a class through a pointer in C++?

1 Mark(s)

Your Answer:

Star operator (*) Star operator (*)
Double colon (::) Double colon (::)
Dot operator (.) Dot operator (.)
Arrow operator (->) Arrow operator (->)

Evaluating Your Answers

Operating Systems Mock Test 1 : Question 1 of 53