Database Systems Mock Test 14

What is the result of (3 + 4j) * (1 - 2j) ?

1 Mark(s)

Your Answer:

-5 - 5j -5 - 5j
-1 + 10j -1 + 10j
-1 - 10j -1 - 10j
5 + 5j 5 + 5j

Tag which is used for adding comments is:

1 Mark(s)

Your Answer:

! - - ! - -
// //
- - ! - - !
* * * *

The shortcut key Ctrl + C in MS Word is used for?

1 Mark(s)

Your Answer:

Copy command Copy command
Cut command Cut command
Paste command Paste command
Bold command Bold command

Which of the following selector selects all elements of E that have the attribute attr that end with the given value?

1 Mark(s)

Your Answer:

E[attr^=value] E[attr^=value]
E[attr$=value] E[attr$=value]
E[attr*=value] E[attr*=value]
none of the mentioned none of the mentioned

Salting passwords helps prevent:

1 Mark(s)

Your Answer:

Rainbow Table attacks Rainbow Table attacks
Brute Force Brute Force
Phishing Phishing
SQL Injection SQL Injection

What will be the output? class One{ final int a = 15; } class Two extends One{ final int a = 20; } public class Test extends Two{ final int a = 30; public static void main(String args[]){ Test t = new One(); System.out.print(t.a); } }

1 Mark(s)

Your Answer:

15 15
20 20
30 30
Compiler Error Compiler Error
None of these None of these

What is the output of the following code: struct Book { char title[50]; int pages; }; Book b; cout << sizeof(b); in C++?

1 Mark(s)

Your Answer:

50 50
Depends on the compiler Depends on the compiler
52 52
60 60

: What is the initial value of an uninitialized array in C?

1 Mark(s)

Your Answer:

0 0
Random garbage values Random garbage values
-1 -1
Null Null

We can travel far away places with ease and in less time by invention of:

1 Mark(s)

Your Answer:

buses buses
aero planes aero planes
missiles missiles
internet internet

In the Longest Mask Matching (LMM), three entries are 127, 126, 124, the first entry should be:

1 Mark(s)

Your Answer:

124 124
126 126
127 127
127 and 124 127 and 124

and elements are same?

1 Mark(s)

Your Answer:

No, they represent different elements No, they represent different elements
First is correct only First is correct only
first is only correct first is only correct
Both are same Both are same

Polymorphism is also possible in C language. Is it correct?

1 Mark(s)

Your Answer:

Yes Yes
No No
both A & B both A & B
none of these none of these

The datagram field is to intentionally limit the journey of the:

1 Mark(s)

Your Answer:

frames frames
packet packet
IP IP
datagrams datagrams

The cost of information can be ___________________?

1 Mark(s)

Your Answer:

Costly Costly
Valuable Valuable
Processing Processing
None of the above None of the above

To set an environment variable in a streaming command use . . . . . . . .

1 Mark(s)

Your Answer:

-cmden EXAMPLE_DIR=/home/example/dictionaries/
-cmdev EXAMPLE_DIR=/home/example/dictionaries/
-cmdenv EXAMPLE_DIR=/home/example/dictionaries/
-cmenv EXAMPLE_DIR=/home/example/dictionaries/

What is meant by standard c++ library?

1 Mark(s)

Your Answer:

It is the collection of class definitions for standard data structures and a collection of algorithms
It is a header file It is a header file
Collection of algorithms Collection of algorithms
Step by step process Step by step process

Which function converts text to uppercase in MS Excel 2016?

1 Mark(s)

Your Answer:

UPPER UPPER
UPPERCASE UPPERCASE
TOPPER TOPPER
None of these None of these

∂2u/∂x2+∂2u/∂y2=0 is:

1 Mark(s)

Your Answer:

ordinary differential equation ordinary differential equation
partial differential equation partial differential equation
temporary differential equation temporary differential equation
integration integration

The best AI agent is one which____________

1 Mark(s)

Your Answer:

Needs user inputs for solving any problem
Can solve a problem on its own without any human intervention
Need a similar exemplary problem in its knowledge base
All of the above All of the above

. . . . . . . . mode is a Namenode state in which it does not accept changes to the name space.

1 Mark(s)

Your Answer:

Recover Recover
Safe Safe
Rollback Rollback
None of the mentioned None of the mentioned

What will be the output of the following Python code? a={1:"A",2:"B",3:"C"} b=a.copy() b[2]="D" print(a)

1 Mark(s)

Your Answer:

Error, copy() method doesn't exist for dictionaries
{1: 'A', 2: 'B', 3: 'C'} {1: 'A', 2: 'B', 3: 'C'}
{1: 'A', 2: 'D', 3: 'C'} {1: 'A', 2: 'D', 3: 'C'}
"None" is printed "None" is printed

Data in the commit log is purged after its corresponding data in the memtable is flushed to an . . . . . . . .

1 Mark(s)

Your Answer:

SSHables SSHables
SSTable SSTable
Memtables Memtables
None of the mentioned None of the mentioned

Short cut Ctrl + T is used to

1 Mark(s)

Your Answer:

Hanging Indent Hanging Indent
Left Indent Left Indent
Open Tabs Dialog box Open Tabs Dialog box
Terminate all opened Dialog box Terminate all opened Dialog box

What will be the output of the following C# code snippet? class maths { int fact(int n) { int result; if (n == 1) return 1; result = fact(n - 1) * n; return result; } } class Output { static void main(String args[]) { maths obj = new maths() ; Console.WriteLine(obj.fact(4)*obj.fact(2)); } }

1 Mark(s)

Your Answer:

64 64
60 60
120 120
48 48

Which symbol is used to create multiple inheritances?

1 Mark(s)

Your Answer:

Dot Dot
Comma Comma
Dollar Dollar
star star

A physician need to make a medicine so that he will be needing for his herbs accurate:

1 Mark(s)

Your Answer:

mass mass
shape shape
smell smell
volume volume

What will the given C code do? #include <stdlib.h> _Mbsave_Mbxlen={0}; int (mblen)(const char *s ,size_t n) { return(_Mbtowc(NULL s,n,&_Mbxlen)); }

1 Mark(s)

Your Answer:

determine length of next multibyte code determine length of next multibyte code
determine next multibyte code determine next multibyte code
translate multibyte string to wide char string
translate wide character to multibyte string

A function that assigns a real number to each member of its domain is:

1 Mark(s)

Your Answer:

real value function real value function
real transfer function real transfer function
real discrete function real discrete function
real domain function real domain function

What does the term "JSP EL" stand for in JavaServer Pages?

1 Mark(s)

Your Answer:

Java Server Page Elements Java Server Page Elements
Java Servlet Page Language Java Servlet Page Language
JSP Expression Language JSP Expression Language
Java Script Page Element Java Script Page Element

TCP is a ______ protocol.

1 Mark(s)

Your Answer:

Connection-oriented Connection-oriented
Connectionless Connectionless
Unreliable Unreliable
Datagram Datagram

A force can change the object's:

1 Mark(s)

Your Answer:

speed speed
volume volume
size size
control control

If the page size increases, the internal fragmentation is also?..?

1 Mark(s)

Your Answer:

Decreases Decreases
Increases Increases
Remains constant Remains constant
None of these None of these

Which access modifier allows a class member to be accessed from any class in the same package but not from outside?

1 Mark(s)

Your Answer:

protected protected
private private
public public
default default

Programs of the operating system usually abort:

1 Mark(s)

Your Answer:

normally normally
abnormally abnormally
Automatically Automatically
On error occurs On error occurs

Suppose an employee demands the root access to a UNIX system, where you are the administrator; that right or access should not be given to the employee unless that employee has work that requires certain rights, privileges. It can be considered as a perfect example of which principle of cyber security?

1 Mark(s)

Your Answer:

Least privileges Least privileges
Open Design Open Design
Separation of Privileges Separation of Privileges
Both A & C Both A & C

If you wanted to deny FTP access from network 200.200.10.0 to network 200.199.11.0 but allow everything else, which of the following command strings is valid?

1 Mark(s)

Your Answer:

access-list 110 deny 200.200.10.0 to network 200.199.11.0 eq ftp access-list 111 permit ip any 0.0.0.0 255.255.255.255
access-list 1 deny ftp 200.200.10.0 200.199.11.0 any any
access-list 100 deny tcp 200.200.10.0 0.0.0.255 200.199.11.0 0.0.0.255 eq ftp
access-list 198 deny tcp 200.200.10.0 0.0.0.255 200.199.11.0 0.0.0.255 eq ftp access-list 198 permit ip any 0.0.0.0 255.255.255.255

Scheduling in which certain amount of CPU time is allocated to each process is:

1 Mark(s)

Your Answer:

earliest deadline first scheduling earliest deadline first scheduling
proportional share scheduling proportional share scheduling
equal share scheduling equal share scheduling
constant share scheduling constant share scheduling

The elasticity of red blood cells helps them to:

1 Mark(s)

Your Answer:

pass through capillaries easily pass through capillaries easily
absorb oxygen easily absorb oxygen easily
release carbon dioxide easily release carbon dioxide easily
move in the veins easily move in the veins easily

Sending data from one place to another, by physical or electronic means is_____________________?

1 Mark(s)

Your Answer:

E-mail E-mail
Internet Internet
Data transmission Data transmission
Distributed processing Distributed processing

Technology helps us towards further:

1 Mark(s)

Your Answer:

hypothesis hypothesis
discoveries discoveries
verification verification
analysis analysis

In Hadoop, what is the purpose of the Hadoop ResourceManager "Node Label" feature in a Hadoop cluster?

1 Mark(s)

Your Answer:

Label nodes for specific workloads Label nodes for specific workloads
Execute MapReduce jobs Execute MapReduce jobs
Manage computation resources Manage computation resources
Manage task execution in MapReduce jobs Manage task execution in MapReduce jobs

What is autoboxing in Java?

1 Mark(s)

Your Answer:

The automatic conversion of primitive types to their corresponding wrapper classes
The process of creating a new box The process of creating a new box
A feature for manually converting wrapper classes to primitive types
A feature for boxing objects A feature for boxing objects

Which keyword is used to define a block-scoped variable?

1 Mark(s)

Your Answer:

var var
const const
let let
int int

Which probing technique uses a quadratic function to resolve collisions?

1 Mark(s)

Your Answer:

Quadratic probing Quadratic probing
Linear probing Linear probing
Double hashing Double hashing
Chaining Chaining

Evaluating Your Answers

Database Systems Mock Test 14 : Question 1 of 44