Computer Science Test

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Computer Science Test - 17

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Weekly Quiz Competition

Question 1
5 / -1

Python is a/an ______based language.

A
Compiler

B
Interpreter

C
Both 1 and 2

D
Neither 1 nor 2

Solution

Python is an interpreted, object-oriented, high-level programming language with dynamic semantics.
Question 2
5 / -1

What do we use to define a block of code in Python language?

A
Key

B
Brackets

C
Indentation

D
None of these

Solution

Python uses indentations to define blocks of code. Indentations are simply spaces or tabs used as an indicator that is part of the indent code child, as used in curly braces C, C++, and Java.
Question 3
5 / -1

Referential integrity constraint in a relational database is specified with the help of a _________.

A
primary key

B
secondary key

C
foreign key

D
none of the above

Solution

A foreign key is a field (or collection of fields) in one table, that refers to the primary key in another table. The table with the foreign key is called the child table, and the table with the primary key is called the referenced or parent table.
Question 4
5 / -1

Which among the following SQL commands does not fall under the category of data manipulation language?

A
DELETE

B
SELECT

C
UPDATE

D
CREATE

Solution

CREATE command is a data definition language command but not a data manipulation command. Data manipulation command is used to manipulate the data of those tables that are created by Data definition languages.
Question 5
5 / -1

Which of the following networking components is called a three-layer switch?

A
Gateway

B
Router

C
Repeater

D
Hub

Solution

This networking component is called a three-layer switch. It can operate at the physical, data link and network layers. A layer 3 switch combines the functionality of a switch and a router. It acts as a switch to connect devices that are on the same subnet or virtual LAN at lightning speeds and has IP routing intelligence built into it to double up as a router.
Question 6
5 / -1

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

A
+

B
in

C
*

D
/

Solution

Operator ''/'' can not be used with string data type.
Question 7
5 / -1

To read the next line of the file from a file object infile, we use ____________.

A
read(2)

B
infile.read()

C
readline()

D
infile.readlines()

Solution

The readlines() method returns a list containing each line in the file as a list item. The hint parameter is used to limit the number of lines returned. If the total number of bytes returned exceeds the specified number, no more lines are returned.
Question 8
5 / -1

Which of the following is correctly evaluated for this function?

pow(x,y,z)

A
(x**y) / z

B
(x / y) * z

C
(x**y) % z

D
(x / y) / z

Solution

The built-in function pow() can accept two or three arguments. When it takes in two arguments, they are evaluated as x**y. When it takes in three arguments, they are evaluated as (x**y)%z.
Question 9
5 / -1

Which of the following is false regarding the loops in Python?

A
Loops are used to perform certain tasks repeatedly.

B
'While loop' is used when multiple statements are to executed repeatedly until the given condition becomes false.

C
'While loop' is used when multiple statements are to executed repeatedly until the given condition becomes true.

D
'For loop' can be used to iterate through the elements of lists.

Solution

'While loop' is used when multiple statements are to be executed repeatedly until the given condition becomes false.

Python 'While loop' is used to execute a block of statements repeatedly until a given condition is satisfied. And when the condition becomes false, the line immediately after the loop in the program is executed. 'While loop' falls under the category of indefinite iteration.
Question 10
5 / -1

Which of the following statements is true?

A
Pickling creates an object from a sequence of bytes.

B
Pickling is used for object serialization.

C
Pickling is used for object deserialization.

D
Pickling is used to manage all types of files in Python.

Solution

Pickle in Python is primarily used in serializing and deserializing of a Python object structure. In other words, it's the process of converting a Python object into a byte stream to store it in a file/database, maintain program state across sessions, or transport data over the network.

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Re-Attempt Weekly Quiz Competition

Computer Science Test - 17

Result

Computer Science Test - 17

Score

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Rank

-

SHARING IS CARING

Question 1

Compiler

Interpreter

Both 1 and 2

Neither 1 nor 2

Solution

Question 2

Key

Brackets

Indentation

None of these

Solution

Question 3

primary key

secondary key

foreign key

none of the above

Solution

Question 4

DELETE

SELECT

UPDATE

CREATE

Solution

Question 5

Gateway

Router

Repeater

Hub

Solution

Question 6

+

in

*

/

Solution

Question 7

read(2)

infile.read()

readline()

infile.readlines()

Solution

Question 8

(x**y) / z

(x / y) * z

(x**y) % z

(x / y) / z

Solution

Question 9

Loops are used to perform certain tasks repeatedly.

'While loop' is used when multiple statements are to executed repeatedly until the given condition becomes false.

'While loop' is used when multiple statements are to executed repeatedly until the given condition becomes true.

'For loop' can be used to iterate through the elements of lists.

Solution

Question 10

Pickling creates an object from a sequence of bytes.

Pickling is used for object serialization.

Pickling is used for object deserialization.

Pickling is used to manage all types of files in Python.

Solution

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