Interview practice mcq

DSA Basic Conversations
#1

Q1- How can a datatype be declared to be a constant type?
1-const
2-var
3-let
4-constant

#2 

Q1- How can a datatype be declared to be a constant type?
1-const
2-var
3-let
4-constant
ans: const
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#3

Q1- How can a datatype be declared to be a constant type?
1-const

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#4

Q1- How can a datatype be declared to be a constant type?
1-const
2-var
3-let
4-constant

ans 1.const

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#5

Q1- How can a datatype be declared to be a constant type?
1-const
2-var
3-let
4-constant

Ans :- const

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#6

Q1- How can a datatype be declared to be a constant type?
1-const
2-var
3-let
4-constant

const

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#7

Q2- What will be the output of the following code snippet?

<script type="text/javascript">
a = 5 + "9";
document.write(a);
</script>

1-Compilation Error
2-14
3-Runtime Error
4-59

#8

Q1- How can a datatype be declared to be a constant type?
1-const
2-var
3-let
4-constant
ans-const

1 Like
#9

Q1- How can a datatype be declared to be a constant type?
1-const
2-var
3-let
4-constant
Ans: const

1 Like
#10

1-const

Once a variable is declared with `constits value cannot be reassigned or changed throughout the code It remains constant during the entire execution of the program

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#11

Const
Const data type can’t be changeble it’s fixed type data

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#12 
Ans :- 59
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#13 

<script type="text/javascript">
a = 5 + "9";
document.write(a);
</script>
1-Compilation Error
2-14
3-Runtime Error
4-59
ans:59
1 Like
#14

Q2- What will be the output of the following code snippet?

<script type="text/javascript">
a = 5 + "9";
document.write(a);
</script>

1-Compilation Error
2-14
3-Runtime Error
4-59

compilation error

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#15

ans- 59

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#16

59

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#17

The output of the following code snippet will be:
59

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#18

Q3-What will be the output of the following code snippet?

<script type="text/javascript" language="javascript">
  
var a = "Scaler";
var result = a.substring(2, 4);
document.write(result);
  
</script>

1-al
2-ale
3-cal
4-caler

#19

Q2- What will be the output of the following code snippet?

<script type="text/javascript">
a = 5 + "9";
document.write(a);
</script>

1-Compilation Error
2-14
3-Runtime Error
4-59
[/quote]

ans 4.59

1 Like
#20
var a = "Scaler"; var result = a.substring(2, 4); document.write(result); ans:al
1 Like