Data Structures Mock Test 15

What will be the output of the following PHP code ? <?php function mine($num) { $num = 2 + $num; echo $num; } mine(3); ?>

1 Mark(s)

Your Answer:

3 3
$num $num
5 5
None of the mentioned None of the mentioned

Win32 application programming interfaces are for

1 Mark(s)

Your Answer:

Windows Windows
UNIX UNIX
Linux Linux
Microsoft Microsoft

What is the purpose of the Hadoop balancer tool?

1 Mark(s)

Your Answer:

To balance the load across Hadoop nodes To balance the load across Hadoop nodes
To optimize Hadoop's network performance
To allocate more resources to specific nodes
To compress data in HDFS To compress data in HDFS

In Java, can you directly access the run() method of a Thread object?

1 Mark(s)

Your Answer:

Only if the thread is marked as "final" Only if the thread is marked as "final"
Yes, but it will execute in the current thread, not as a separate thread
Only if the thread is marked as "static"
None of These None of These

The number of arguments taken as input which allocating memory dynamically using malloc() is . . . . . . . .

1 Mark(s)

Your Answer:

0 0
1 1
2 2
3 3

Call by value What is a potential risk of using call by reference?

1 Mark(s)

Your Answer:

Memory is duplicated Memory is duplicated
The function cannot modify the original argument
The function can inadvertently modify the original argument
It uses too much memory It uses too much memory

Which of the following is used to create a stream that performs both input and output operations?

1 Mark(s)

Your Answer:

ofstream ofstream
ifstream ifstream
iostream iostream
fstream fstream

In HTML5 how many new semantic elements were introduced?

1 Mark(s)

Your Answer:

4 4
5 5
6 6
8 8

What is false about constructor?

1 Mark(s)

Your Answer:

Constructors cannot be synchronized in Java
Java does not provide default copy constructor
Constructor can have a return type Constructor can have a return type
"this" and "super" can be used in a constructor

What will be the output of the following Python code? print("xyyzxyzxzxyy".endswith("xyy"))

1 Mark(s)

Your Answer:

1 1
True True
3 3
2 2

MySQL is just as powerful as Oracle and is half the price.

1 Mark(s)

Your Answer:

True True
False False

Which of the following user type can view audit list

1 Mark(s)

Your Answer:

Tally Vault Tally Vault
Owner Owner
Data Entry Data Entry
Administrator Administrator

Average speed of an object is equals to:

1 Mark(s)

Your Answer:

total distance covered by object/2 total distance covered by object/2
total distance covered by object/60m total distance covered by object/60m
total distance covered by object/rate of change of time
2 x total distance covered by object/rate of change of time

What will be the output of the following PHP code ? <?php class Constants { define('MIN_VALUE', '0.0'); define('MAX_VALUE', '1.0'); public static function getMinValue() { return self::MIN_VALUE; } public static function getMaxValue() { return self::MAX_VALUE; } } echo Constants::getMinValue(); echo Constants::getMaxValue(); ?>

1 Mark(s)

Your Answer:

0.01.0 0.01.0
01 01
No output No output
ERROR ERROR

What will be the output of the following Java program if input given is 'abcqfghqbcd'? class Input_Output { public static void main(String args[]) throws IOException { char c; BufferedReader obj = new BufferedReader(new InputStreamReader(System.in)); do { c = (char) obj.read(); System.out.print(c); } while(c != 'q'); } }

1 Mark(s)

Your Answer:

abcqfgh abcqfgh
abc abc
abcq abcq
abcqfghq abcqfghq

What is the result of the following code snippet? window.location === document.location

1 Mark(s)

Your Answer:

False False
True True
0 0
1 1

A distributed unit of work allows various statements within a unit of work to refer to multiple remote DBMS locations.

1 Mark(s)

Your Answer:

True True
False False

In how many modes can the Closure compiler be run?

1 Mark(s)

Your Answer:

2 2
3 3
4 4
5 5

Which of the following is the first national park in India?

1 Mark(s)

Your Answer:

Gir National park Gir National park
Kanha National park Kanha National park
Jim Corbett National park Jim Corbett National park
Ranthambore National park Ranthambore National park

Which of the following attribute specifies the URL of the linked resource?

1 Mark(s)

Your Answer:

src src
link link
rel rel
href href

What does the 'strcat' function in C do?

1 Mark(s)

Your Answer:

Concatenates two strings Concatenates two strings
Compares two strings Compares two strings
Copies one string to another Copies one string to another
Searches for a substring Searches for a substring

Which one of the following server in DNS usually does not store any information about domains but delegates its authority to other servers, keeping references to those servers?

1 Mark(s)

Your Answer:

main server main server
sub server sub server
root server root server
host server host server

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

Referential integrity can be violated by the means of:

1 Mark(s)

Your Answer:

Consistency Constraints Consistency Constraints
Modifications Modifications
Domain Domain
Assertions Assertions

Which are usually variables that are used internally in object methods and also are globally visible variables?

1 Mark(s)

Your Answer:

Object properties Object properties
Variable properties Variable properties
Method properties Method properties
Internal properties Internal properties

Which data structure is efficient for finding the 'k-th' largest element in a stream?

1 Mark(s)

Your Answer:

Max-Heap Max-Heap
Min-Heap Min-Heap
Array Array
Linked List Linked List

What keystroke will terminate setup mode?

1 Mark(s)

Your Answer:

Ctrl+Z Ctrl+Z
Ctrl+^ Ctrl+^
Ctrl+C Ctrl+C
Ctrl+Shift+^ Ctrl+Shift+^

_______________is the most important/powerful computer in a typical network?

1 Mark(s)

Your Answer:

Desktop Desktop
Network client Network client
Network server Network server
Network station Network station

The `static` block in Java executes:

1 Mark(s)

Your Answer:

Class load time Class load time
Object creation time Object creation time
Method call Method call
Program end Program end

Speed of dot-matrix printer is measured in:

1 Mark(s)

Your Answer:

cps cps
dpi dpi
ppm ppm
lmp lmp

Use the .............. to delete the data inside the table, and not the table itself?

1 Mark(s)

Your Answer:

DROP TABLE DROP TABLE
DELETE TABLE DELETE TABLE
TRUNCATE TABLE TRUNCATE TABLE
REMOVE TABLE REMOVE TABLE

In Routing Information Protocol (RIP), to send a packet to one of the three networks at the far left, router R1 needs to deliver the packet to:

1 Mark(s)

Your Answer:

R0 R0
R3 R3
R-1 R-1
R2 R2

How do you break out of a loop in Ruby?

1 Mark(s)

Your Answer:

exit() exit()
break() break()
continue() continue()
end() end()

In MS Word 2010, commands are organized into _____ on the Ribbon.

1 Mark(s)

Your Answer:

Groups Groups
Tabs Tabs
Menus Menus
Toolbars Toolbars

Which of the following is true about multi-dimensional arrays?

1 Mark(s)

Your Answer:

Memory is not contiguous Memory is not contiguous
Rows can have different lengths Rows can have different lengths
They are arrays of arrays They are arrays of arrays
Cannot store integers Cannot store integers

What will be the output of the following PHP code ? <?php while() { print "hi"; } ?>

1 Mark(s)

Your Answer:

infinite loop infinite loop
hi hi
no output no output
error error

There are numerous applications that require computation of similar transitive closures on:

1 Mark(s)

Your Answer:

Templates Templates
Relations Relations
Hierarchies Hierarchies
Temporary tables Temporary tables

In css what does “color:red” can be called as

1 Mark(s)

Your Answer:

Selector Selector
Rule Rule
Declaration Declaration
None of the above None of the above

Speed is a:

1 Mark(s)

Your Answer:

vector quantity vector quantity
scalar quantity scalar quantity
infinite quantity infinite quantity
unit vector unit vector

A class is a concept, abstraction, or thing that makes sense in an application context.

1 Mark(s)

Your Answer:

True True
False False

Which header file is required for file handling in C++?

1 Mark(s)

Your Answer:

<iostream> <iostream>
<fstream> <fstream>
<file> <file>
<filestream> <filestream>

What is the purpose of Hadoop's HDFS Snapshot in the context of security?

1 Mark(s)

Your Answer:

Creating point-in-time copies of HDFS directories
Enhancing data replication in HDFS Enhancing data replication in HDFS
Improving the performance of MapReduce jobs
Implementing role-based access control Implementing role-based access control

What will be the output of the following C++ code? #include <iostream> #include <string> using namespace std; int main () { string name ("Jobs"); string family ("Steve"); name += " Apple "; name += family; name += '\n'; cout << name; return 0; }

1 Mark(s)

Your Answer:

Steve Jobs Steve Jobs
Apple Apple
Jobs Apple Steve Jobs Apple Steve
Apple Steve Apple Steve

The . . . . . . . . executes the Mapper/ Reducer task as a child process in a separate jvm.

1 Mark(s)

Your Answer:

JobTracker JobTracker
TaskTracker TaskTracker
TaskScheduler TaskScheduler
None of the mentioned None of the mentioned

Which type of binary search tree is imitated for construction of tango tree?

1 Mark(s)

Your Answer:

Complete Binary Search Tree Complete Binary Search Tree
Perfect Binary Search Tree Perfect Binary Search Tree
Balanced Binary Search Tree Balanced Binary Search Tree
Degenerate Binary Search Tree Degenerate Binary Search Tree

__________ prevents the page from being indexed altogether.

1 Mark(s)

Your Answer:

noarchive noarchive
nofollow nofollow
noindex noindex
novalue novalue

Evaluating Your Answers

Data Structures Mock Test 15 : Question 1 of 46