(Pre-Finals) Web Systems And Technologies Mocktest BSIT 604

31回閲覧 • 36問 • 1ヶ月前

問題一覧

It is a separate piece of code intended to perform a specific task.

Function

Which statement is NOT TRUE about Functions in JavaScript?

A JavaScript function aims to NOT divide the code into logically independent parts to make a long program that is not a sequence of instructions easier to write and understand.

Which is the correct syntax in creating a function?

function functionName() { }

Which is the correct way of calling a function in JavaScript?

getMeanTemp();

It causes the function to end exactly wherever this word is placed in the instruction. It also allows programmers to return a given value from inside the function to the place where it was called.

return statement

This variable is only usable inside its corresponding function block and usually declared inside a function

Local variable

This variable is usable anywhere in the program. It is declared outside any block or function.

Global variable

These happen due to misconceptions when solving a problem, improper use and typos of the programming language, or the inability to predict user behavior.

Errors

These are only optional to use in functions. These are names separated by commas, placed inside the parenthesis after the function name, and treated as local variables

Parameters

They refer to the values given when a function is called

Arguments

Which is the correct syntax for parameters?

function add(first, second) { }

Which is the correct syntax for arguments?

let result = add(5, 7);

The “grammar” in the programming language is the _____, a set of rules that defines the structure of the instructions

Syntax

The “vocabulary” are the ______ or list of words that can be used to build instructions.

Keywords

It appears when a code is ill-formed, when typos occur, or when unmatching parenthesis or brackets. The code cannot even be executed as JavaScript cannot understand it.

SyntaxError

iff (true) { console.log("true"); } What error does this program have?

SyntaxError

This error occurs when the programmer tries to access a function or a variable that does not exist.

ReferenceError

let a = 3; let a = c; What error does this program have?

ReferenceError

This error occurs when a specific value is not of the expected type, such as changing the constant value or checking the length of a variable that is not a string.

TypeError

const someConstValue = 4; someConstValue = 3; let someNumber = 12; someNumber.length(); What error does the code have?

TypeError

This error is generated when a value is passed to a function outside its acceptable range

RangeError

let testArray1 = Array(10); console.log(testArray1.length); // -> 10 let testArray2 = Array(-1); console.log(testArray2.length); Which error does the code have?

RangeError

These are also called run-time errors, which appear while the program is running. By default, these interrupt the program execution and show the appropriate information to appear on the console.

Exceptions

It is done to prevent the program from stopping after an error

Exception Handling or Error Handling

To handle exceptions in JavaScript, this statement is used.

Try…catch

Which is the correct syntax of a try-catch statement?

try { } catch (error) { }

This is also an optional block of the try statement, although at least one of them is required or a SyntaxError is thrown. It can be used with or without the catch block and is always executed after the try and catch blocks, no matter what errors are thrown.

Finally Statement

Which is the correct syntax of a finally statement?

try { } catch (error) { } finally { }

It is part of troubleshooting in programming.

Debugging

This statement causes the program to stop or halt its execution on the line where it is placed and waits for a decision. It also works as a breakpoint in the code execution, pausing the debugger execution.

debugger

Which is the correct syntax for debugger statement?

debugger;

It is a debugger feature to execute codes on a step-by-step basis. It means that program execution can be stopped at any place using the debugger statement and then continue the execution one instruction at a time.

Step-by-Step Program Execution

"It resumes the execution of the script typically. The debugger runs the program and “breaks” on user-defined breakpoints." Which Step in Step-by-Step Program Execution is being described?

Resume

"It treats the function as a set of instructions intended to be executed separately. It is used when the code needs to be analyzed in detail. The debugger will jump inside the code of the next instruction if it is a function call." Which Step in Step-by-Step Program Execution is being described?

Step Into

"It is used when the next instruction is a call to a function where the impact is unclear or uninterested. It treats the function call as something indivisible." Which Step in Step-by-Step Program Execution is being described?

Step Over

"It allows to immediately jump out of a function where the code is paused. This action proceeds until the function returns if the debugger is within the code block." Which Step in Step-by-Step Program Execution is being described?

Step Out

The Contemporary World Mock test (Prelims)

Xai Alexandrei Delos Reyes · 3回閲覧 · 58問 · 2年前

The Contemporary World Mock test (Prelims)