TypeScript & The TypeScript Migration

TypeScript là ngôn ngữ thiết kế bởi công ty nào?

• Yahoo

• Facebook

• Microsoft

• Google

Existing JavaScript programs are also valid TypeScript programs?

• No

• Yes

JavaScript features in which stage of TC39 process will be included in latest version of TypeScript?

• Stage 0

• Stage 1

• Stage 2

• Stage 3

• Stage 4

Which following one are valid types of TypeScript?

• string, integer, boolean, float

• string, number, boolean, bigint

• String, Number, Boolean, Float

• String, Integer, Boolean, BigInt

Which statement is correct?

• A union type combines multiple types into one & An intersection type is a type formed from two or more other types, representing values that may be any one of those types.

• An intersection type combines multiple types into one & A union type is a type formed from two or more other types, representing values that may be any one of those types.

• Both are correct.

• Both are incorrect.

How can we declare an Enum type?

• enum LOG_LEVEL = { 1 = ERROR, 2 = WARN }

• enum LOG_LEVEL { 1 = ERROR, 2 = WARN }

• enum LOG_LEVEL = { ERROR = 1, WARN = 2 }

• enum LOG_LEVEL { ERROR = 1, WARN = 2 }