Computer Science Test

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Computer Science Test - 26

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Weekly Quiz Competition

Question 1
5 / -1

Which of the following string functions in 'C' converts lowercase input string into uppercase?

A
strlwr()

B
strchr()

C
strupr()

D
none of these

Solution

The strupr() function is used to convert a given string to uppercase.
Question 2
5 / -1

What is the fundamental unit of data transport on computer networks?

A
Hub

B
Packet

C
Signal

D
Switch

Solution

A network packet is a formatted unit of data carried by a packet-switched network. Computer communications links that do not support packets, such as traditional packet switching, simply transmit data as a bit stream. When data is formatted into packets, the bandwidth of the communication medium can be better shared among users than with circuit switching. A packet consists of control information and user data, which is also known as the payload. Control information provides data for delivering the payload, for example: source and destination network addresses, error detection codes, and sequencing information. Typically, control information is found in packet headers and trailers.
Question 3
5 / -1

172.16.122.204 IP address belongs to which IP addresses class?

A
Class B

B
Class A

C
Class E

D
Class C

Solution

Option 1 is the correct answer. The address range of this class is from 128.0.0.0 to 191.255.255.255.
Question 4
5 / -1

Two statements are given below:

Statement I: Hashing technique is very fast and efficient for large collections, but requires additional memory to store the hash table.

Statement II: Binary search technique is suitable for small collections but can be slow for larger collections.

A
Both Statement I and Statement II are correct.

B
Both Statement I and Statement II are incorrect.

C
Statement I is correct, but Statement II is incorrect.

D
Statement I is incorrect, but Statement II is correct.

Solution

Statement I is correct. Hashing technique is very fast and efficient for large collections, but requires additional memory to store the hash table. Statement II is a fact for Linear Search not for a Binary Search. Binary Search technique reduces the search space by half at each step, making it faster than linear search for larger collections.
Question 5
5 / -1

The CSV files can be accessed:

A
Only through text editor and spreadsheet software

B
Only through python programs

C
Only through spreadsheet software

D
Only through database software

Solution

Opening a CSV file is simpler than you may think. In almost any text editor or spreadsheet program, just choose File > Open and select the CSV file.
Question 6
5 / -1

Directions: Match the contents under List I with those under List II.

A
A-IV, B-III, C-I, D-II

B
A-III, B-IV, C-II, D-I

C
A-III, B-IV, C-I, D-II

D
A-III, B-I, C-IV, D-II

Solution

Join command combines rows from two or more tables.

Group By command groups the result set by specified columns.

Order By command sorts the result set based on a specified column.

Where clause filters the result set based on specified conditions.
Question 7
5 / -1

What is sorting?

A
Searching for the specified data element in a data structure

B
Processing all the data elements of a data structure

C
Aranaging data elements of a data structure in a specified order

D
Combining elements of two similar data structures to form a new data structures of same type

Solution

Sorting is the process of arranging data into meaningful order so that you can analyze it more effectively.
Question 8
5 / -1

Which of the following operators cannot be used with string data type?

A
+

B
in

C
*

D
/

Solution

The ''/'' operator cannot be used with string data type, while the rest three can be used for strings data type.
Question 9
5 / -1

Database management systems are intended to:

A
Eliminate data redundancy

B
Establish relationships among records in different files

C
Manage file access

D
All of the above

Solution

Database management systems are intended to eliminate data redundancy, establish relationships among records in different files and manage file access. Since all of the given options are true, option 4 is the correct answer.
Question 10
5 / -1

Which statement is true about denial of service (DOS attack)?

A
This type of attack intends to make resources or service unavailable to its intended users.

B
This attack generates large amount of traffic on a victims network, which causes the network to crash.

C
It is a type of DOS attach where the attacker sends a large amount of UDP echo traffic to IP broadcast addresses.

D
This type of attack activates only if a certain event occurs.

Solution

Dos attack is the type of attack intended to make resources or service unavailable to its intended users. Such DOS attacks are carried out on websites to stop them from functioning.

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Computer Science Test - 26

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Computer Science Test - 26

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SHARING IS CARING

Question 1

strlwr()

strchr()

strupr()

none of these

Solution

Question 2

Hub

Packet

Signal

Switch

Solution

Question 3

Class B

Class A

Class E

Class C

Solution

Question 4

Both Statement I and Statement II are correct.

Both Statement I and Statement II are incorrect.

Statement I is correct, but Statement II is incorrect.

Statement I is incorrect, but Statement II is correct.

Solution

Question 5

Only through text editor and spreadsheet software

Only through python programs

Only through spreadsheet software

Only through database software

Solution

Question 6

A-IV, B-III, C-I, D-II

A-III, B-IV, C-II, D-I

A-III, B-IV, C-I, D-II

A-III, B-I, C-IV, D-II

Solution

Question 7

Searching for the specified data element in a data structure

Processing all the data elements of a data structure

Aranaging data elements of a data structure in a specified order

Combining elements of two similar data structures to form a new data structures of same type

Solution

Question 8

+

in

*

/

Solution

Question 9

Eliminate data redundancy

Establish relationships among records in different files

Manage file access

All of the above

Solution

Question 10

This type of attack intends to make resources or service unavailable to its intended users.

This attack generates large amount of traffic on a victims network, which causes the network to crash.

It is a type of DOS attach where the attacker sends a large amount of UDP echo traffic to IP broadcast addresses.

This type of attack activates only if a certain event occurs.

Solution

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