Computer Science Test

Question 1
5 / -1

Two statements are given below:

Statement I: A primary key in DBMS is a field that uniquely identifies each record in a table and can be Null.

Statement II: A foreign key in DBMS is a field that contains unique values and is used to link related tables together.

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.

Question 2
5 / -1

The postfix form of A*B + C/D is

A
*AB/CD+

B
A*BC+/D

C
AB*CD/+

D
ABCD+/*

Question 3
5 / -1

The file offset position of a file opened in < r > mode is _________.

A
End of the file

B
Begining of the file

C
Any where in the file

D
One byte before the end of the file

Question 4
5 / -1

Consider the following python code: def myDiv(x, y): if

y = = 0:

raise ZeroDivisionError

return x/y

What is the output of the following?

n = myDiv(4,0)

print(n)

A
0.0

B
No output

C
Zero Division Error

D
Value Error

Question 5
5 / -1

_________ Communication mode allows communication in both directions simultaneously.

A
Simplex

B
Half duplex

C
Full duplex

D
Half simplex

Question 6
5 / -1

Choose the advantages of a database over file system from the following statements.

A. Reduces data redundancy and saves storage.

B. Sharing of data is possible.

C. Difficult to access the data in formatted way.

D. Data inconsistency is reduced to larger extent

E. Databases are not portable.

Choose the correct answer from the options given below:

A
B, C, and D only

B
A, B and D only

C
A, B and E only

D
A, C and D only

Question 7
5 / -1

What is mean by stable sorting algorithm?

A
A sorting algorithm is stable if it doesn’t preserve the order of duplicate keys

B
A sorting algorithm is stable if it preserves the order of duplicate keys

C
A sorting algorithm is stable if it preserves the order of all keys

D
A sorting algorithm is stable if it preserves the order of non-duplicate keys

Question 8
5 / -1

What is the return type of readline() function?

A
String

B
Tuple

C
List

D
Dictionary

Question 9
5 / -1

In Python code, on encountering a syntax error, the _____________ does not execute the program.

A
Processor

B
Editor

C
Interpreter

D
Converter

Question 10
5 / -1

Which mode will write data to a file even if the file does not exist?

A
w+

B
r+

C
a+

D
Both w+ and a+

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Computer Scienc...

Question 1

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.

Question 2

*AB/CD+

A*BC+/D

AB*CD/+

ABCD+/*

Question 3

End of the file

Begining of the file

Any where in the file

One byte before the end of the file

Question 4

0.0

No output

Zero Division Error

Value Error

Question 5

Simplex

Half duplex

Full duplex

Half simplex

Question 6

B, C, and D only

A, B and D only

A, B and E only

A, C and D only

Question 7

A sorting algorithm is stable if it doesn’t preserve the order of duplicate keys

A sorting algorithm is stable if it preserves the order of duplicate keys

A sorting algorithm is stable if it preserves the order of all keys

A sorting algorithm is stable if it preserves the order of non-duplicate keys

Question 8

String

Tuple

List

Dictionary

Question 9

Processor

Editor

Interpreter

Converter

Question 10

w+

r+

a+

Both w+ and a+

User

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