Why do we use synchronized ?

804

---

What widgets can not do ?

891

---

What is synchronous vs. Asynchronous in gcd ?

779

---

What is the ? In swift?

863

---

What is @synthesize in objective-c ?

832

---

What’s the difference between an “app id” and a “bundle id” and what is each used for?

877

---

What is a category and when is it used?

886

---

What are “strong” and “weak” references? Why are they important and how can they be used to help control memory management and avoid memory leaks?

773

---

What are the limits of accessibility ?

847

---

Explain the characteristics of ios?

810

---

Explain place holder constraint

780

---

Explain differences between foundation and corefoundation

834

---

What is auto-layout?

906

---

What is the difference between let and var in swift?

905

---

What is the difference between atomic and non-atomic properties? Which is the default for synthesized properties? When would you use one over the other?

757

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