Why do we use synchronized ?

827

---

What widgets can not do ?

902

---

What is synchronous vs. Asynchronous in gcd ?

792

---

What is the ? In swift?

870

---

What is @synthesize in objective-c ?

844

---

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

891

---

What is a category and when is it used?

910

---

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?

785

---

What are the limits of accessibility ?

861

---

Explain the characteristics of ios?

833

---

Explain place holder constraint

790

---

Explain differences between foundation and corefoundation

850

---

What is auto-layout?

921

---

What is the difference between let and var in swift?

927

---

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?

771

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